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Old 01-17-2014, 10:21 PM   #1
scraphauler70
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1972 chevcummins

just bought 1972 pickup with 1994 12 valve in he frame rails just wondering if anyone has a wiring diagram for wiring up the alternator into the original harness.
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Old 01-18-2014, 11:09 AM   #2
gerfunken
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Re: 1972 chevcummins

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Originally Posted by scraphauler70 View Post
just bought 1972 pickup with 1994 12 valve in he frame rails just wondering if anyone has a wiring diagram for wiring up the alternator into the original harness.
Congratulations, we anxiously await photographic evidence of said acquisition....

Here's what I have with regards to the electrical diagrams, although they're all for the Chevy side. The dodge really only has 4 leads, so it should line up in some fashion....I just haven't gotten back under the hood since I'm trying to get the fueling system tied up and the bed back on. I lost the spot for my regulator in the conversion, so I'm still figuring location out.

For Reference

From VetteVet



From Justin (boundstaffpress)


Full Size Here

Full Size Here
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Old 01-18-2014, 11:45 AM   #3
ryanroo
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Re: 1972 chevcummins

I'm with Scott. We need some pics!

congrats on the score though. let the madness continue.
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Old 01-19-2014, 11:40 AM   #4
Dieselwrencher
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Re: 1972 chevcummins

Here is a diagram I posted in another thread for using a Ford type external regulator. It's in post 217. I tried re attaching it, but couldn't on this Kindle.

http://www.67-72chevytrucks.com/vboa...=527100&page=9
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1972 Chevy Longhorn K30 Cheyenne Super, 359 Inline 6 cylinder, Auto Trans, Tilt, Diesel Tach/Vach, Buckets, Rare Rear 4-link and air ride option Build Thread
1972 GMC Sierra Grande Longhorn 4x4
1972 Chevy Cheyenne Super K20 Long Step side tilt, tach, tow hooks, AC, 350 4 speed
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Old 01-19-2014, 01:20 PM   #5
gerfunken
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Re: 1972 chevcummins

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Originally Posted by Dieselwrencher View Post
Here is a diagram I posted in another thread for using a Ford type external regulator. It's in post 217. I tried re attaching it, but couldn't on this Kindle.

http://www.67-72chevytrucks.com/vboa...=527100&page=9
Trying to help you out here

Name:  externalRegulator.jpg
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Old 01-20-2014, 03:38 PM   #6
Dieselwrencher
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Re: 1972 chevcummins

Thanks Scott.
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1972 Chevy Longhorn K30 Cheyenne Super, 359 Inline 6 cylinder, Auto Trans, Tilt, Diesel Tach/Vach, Buckets, Rare Rear 4-link and air ride option Build Thread
1972 GMC Sierra Grande Longhorn 4x4
1972 Chevy Cheyenne Super K20 Long Step side tilt, tach, tow hooks, AC, 350 4 speed
1972 C10 Suburban Custom Deluxe
1969 Chevy milk truck
1971 Camaro RS 5.3 BTR STG3 Cam Super T10
1940 Ford 354 Hemi 46RH Ford 9" on air ride huge project


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Old 01-26-2014, 10:13 PM   #7
1972RedNeck
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Re: 1972 chevcummins

Ford used Nippondenso alternators on bigger trucks in the 70's with their normal regulators. When stuffing a Cummins in Ford, this makes the charging system very easy to hook up.
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I once pulled an intake manifold for a cam swap... ended up with a full on drag car that ran in the 11's.
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Old 01-27-2014, 03:36 PM   #8
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Re: 1972 chevcummins

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Originally Posted by 1972RedNeck View Post
Ford used Nippondenso alternators on bigger trucks in the 70's with their normal regulators. When stuffing a Cummins in Ford, this makes the charging system very easy to hook up.
That's good info. But if you use the alternator from a dodge cummins it is a bolt on unit and you only have to wire an external regulator and you're good to go.
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1972 Chevy Longhorn K30 Cheyenne Super, 359 Inline 6 cylinder, Auto Trans, Tilt, Diesel Tach/Vach, Buckets, Rare Rear 4-link and air ride option Build Thread
1972 GMC Sierra Grande Longhorn 4x4
1972 Chevy Cheyenne Super K20 Long Step side tilt, tach, tow hooks, AC, 350 4 speed
1972 C10 Suburban Custom Deluxe
1969 Chevy milk truck
1971 Camaro RS 5.3 BTR STG3 Cam Super T10
1940 Ford 354 Hemi 46RH Ford 9" on air ride huge project


Tired of spark plugs? Check this out.
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